Polyetheretherketone peek is a linear aromatic polymer compound containing links in the main chain of the molecule. Its constitutive unit is oxygen-p-phenylene-oxygen-carbonyl-p-phenylene, is semi-crystalline, thermoplastic. Melting point 334 ℃, softening point 168 ℃, tensile strength 132 ~ 148MPa, can be used as high temperature resistant structural materials and electrical insulation materials, can be composite with glass fiber or carbon fiber to prepare reinforced materials. Polyether ether ketone peek plastic material is an aromatic crystalline thermoplastic polymer material with high mechanical strength, high temperature resistance, impact resistance, flame retardant, acid and alkali resistance, hydrolysis resistance, abrasion resistance, fatigue resistance, irradiation resistance and good electrical properties. Polyether ether ketone peek resin is a new type of special engineering plastics, with good toughness and rigidity. Polyether ether ketone peek is a kind of material for repairing cranial defects, on the one hand, to restore the integrity of the skull, improve the appearance of the aesthetic degree; on the other hand, to protect the brain tissue is not damaged, to rebuild a complete closed cranial cavity, reshape the stable intracranial environment, to ensure the normal intracranial activities and normal operation of the cerebral nervous function. Polyether ether ketone peek is a new type of polymer material, it is fully compliant with the national YY/T0660-2008 surgical implant industry standards, through three-dimensional reconstruction, 3D printing, highly restored cranial structure, after the repair of both sides of the symmetry; polyether ether ketone peek’s performance is very excellent, low rate of rejection and infection, does not affect the CT MRI and other examinations, embedded repair, smooth articulation, high comfort, high mechanical strength of the material, the material has a high degree of comfort, the material mechanical strength, the material has a high degree of comfort. High comfort, high mechanical strength of the material, high impact resistance, good protective performance, polyether ether ketone peek has become the new trend of cranial bone repair materials.